Incident Drill: 'Model X Hallucinated Yesterday' — Root-Cause Matrix
Most-feared sentence in production: 'Model is returning garbage'. Cookbook's systematic root-cause matrix: model version change, base model update, API provider deprecation, dataset poisoning, prompt injection, sampling temp config drift. Incident response playbook, blameless postmortem template.
Şükrü Yusuf KAYA
22 min read
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1. Root-Cause Matrix#
| Symptom | Olası neden | Tespit |
|---|---|---|
| Output garbage | Model version yanlış | Lineage triple kontrol |
| Latency spike | GPU saturation | nvtop, vLLM metrics |
| Hallucination artışı | Prompt template change | git diff |
| Refusal artışı | RLHF model güncellendi | A/B baseline |
| Format bozulması | Stop tokens config | sampling params check |
| TR kalite düşüş | Dataset poison ya da forgetting | TR-MMLU snapshot |
Cookbook'un kuralı: Every incident → blameless postmortem doc (5 Whys + action items + prevention).
✅ Part XVI tamamlandı
- Sample incident scenario yaz + drill. 2) Postmortem template hazırla. 3) Sonraki Part: Part XVII — Türkiye Use-Case Labs.
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